Estimation of the Sustainable Potential of Scads Fish (Decapterus spp) landed at the Belawan Ocean Fishing Port North Sumatra

Abstract

Scads fish (Decapterus spp.) is a fish that is widely consumed by the community so that consumer demand in the market is high for Scads Fish. Based on the Statistics book from the KKP, the catch of Scadsfish has decreased in catches from 2014 to 2016, this is due to continuous catching. The purpose of this study was to estimate the sustainable potential and to determine the level of utilization of Scads Fish in Belawan Ocean Fishing Port, North Sumatra. The research data was obtained from the Belawan Ocean Fishery Port in February 2021. The method used in this study is a survey method, using an equation model, namely Schaefer. The data analysis is a simple linear regression analysis using SPSS version 20. The sustainable potential of Scads Fish (Decapterus spp.) in the last 5 years is 16,526 tons/year with a utilization rate of 67.98% which is included in the catch density category and the number of fish catches allowed is 13,221 tons/year

Estimation of the sustainable potential of scads fish (Decapterus sp.) landed at the Pusong Fish Landing Base, Lhokseumawe

“…Meanwhile, in 2020 the CPUE value again decreased to 0.51 tons/trip due to an increase in the number of vessels compared to the previous year. According to [25] stated that the trend of the CPUE value of scad decreasing in the waters of the Malacca Strait is an indication that the level of utilization of scad resources if it continues to be exploited will lead to a condition called overfishing.…”

“…Based on the results of this relationship, it is known that the Intercept value (a) obtained is 1.536284 and the slope value (b) is -0.0004 which means that if an increase in one trip capture effort is carried out, it will reduce CPUE by 0.0004 tons/trip and the value of R 2 = 0.1126 means that 11% of the decrease in catch production is caused by fishing efforts, while 89% decrease in catch production is caused by natural factors and biological factors. According to [25] the Schaefer model applies if the slope value (b) is positive, then the calculation of potential and optimum fishing efforts do not need to be continued because the addition of capture efforts allows increasing the catch, and vice versa if the Slope value (b) is negative, then any additional capture attempt will cause a decrease in the CPUE value by the value of b. The relationship between CPUE and fish resource effort results in a downward trendline which means an excess of fishing efforts (trip).…”

Model of Phytoplankton Diversity in Belawan River, North Sumatera, Indonesia

“…Belawan River is located in two districts/cities, namely the Deli Serdang Regency covering an area of 3,802.93 ha (93.23%) and Medan City covering an area of 276.07 ha (6.77%) 1 . Belawan River crosses the Medan Area where the river flows through residential, industrial and steam power plants (PLTU), PDAM and encroachment 2 .…”